A touchstone, also refered to as a test stone, is a small, abrasive, silicone based stone that is impervious to acid and easy to clean. When a metal is rubbed on a touchstone, a small amount of the metal is deposited on the stone, forming a colored stripe. This is usually compared to a strip ground from a known metal. A drop of testing solution is then applied to the stripes. By observing the reaction between the acid and the metal stripes, the purity of the metal can be determined.
This test stone measures 2" x 1-1/2" x 3/8"
Each order is for one test stone
Test solutions must be purchased separately
Product Information Specifications for Small Touchstone for Precious Metal Test Kits Below:
3 Bottles Silver Test Acid Testing Sterling Jewelry Solution Liquid Metal Tester
You will receive 3 bottles of Silver Testing Acid, used to determine the Silver content of the piece being tested. Â· Each bottle has 1/2 fl oz of acid. Â· The sturdy plastic bottles maximize safety and allow the user to easily squeeze out one dr...
This Gold Testing Kasoti Is A Small, Flat Stone Which Can Be Used To Test The Purity Of Gold Items. It Measures 2 1/2" X1 1/2"x 1/8". To Be Used With Gold Testing Keys And Acids (not Included). * 2.5" X 1.5" (6mm) * Compact Size * Use With Acid (not ...
Jewelers Gold Testing Supplies 22k 24k 1 Bottle Test Solution Plus Scratch Stone and Free 22k Mini Gold Bar
Instructions and purity chart are included. The Gold Test Acid will change color if the metal is not at least 22k pure gold. Stone measures (inches) 2" x 2", and will NOT damage the item(s) you wish to test. Excellent for testing jewelry at home, or ...
Jeweler's Gold Testing Pieces-14 Karat Acid Test Solution Easy to Use
Instructions and purity chart are included. The Gold Test Acid will change color if the metal is not at least 14k pure gold. Stone measures (inches) 2" x 2", and will NOT damage the item(s) you wish to test. Excellent for testing jewelry at home, ...
Silver Acid Testing Solution 1/2 oz Bottle When testing items said to be Silver: Scratch or rub the metal you are testing onto the stone. Scratch hard enough to make a visible streak or mark onto the stone. The Silver will change colors based on puri...
10 New 10K Gold Testing Solutions This is a new set of ten bottles of 10 karat gold testing solution Each bottle has 1/2 fl oz of acid These are the finest acids made today Sturdy plastic bottles maximize safety and allow the user to easily squeeze o...
PuritestTM Large Stone 6"x3" with Rubber Backing Gold Testing Solutions Kit 10k 14k 18k 22k Silver Platinum Scratch Stone
Large 6x3 inch PuriTESTTM Pro-Quality Testing Stone. This large glass test stone includes a rubber grip backing. This test stone measures 6" x 3" x 1/4" *YOU CAN TEST SEVERAL PIECES AT ONCE WITH THIS EXTRA LARGE TEST STONE!* (Test Stones are used to ...